Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses

46578 Products showing for Fuses & Circuit Breakers

243 / 999+
In Stock
Schneider Electric RCBO, 16A Current Rating, 3P Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 212-247
  • Mfr. Part No. A9D17316
Each
MYR1,946.90
Temporarily out of stock
Eaton 32A Rail Mount Fuse Holder, 1P, 550V ac
  • RS Stock No. 182-1721
  • Mfr. Part No. 32NNSFBS
Each
MYR79.55
In Stock
nVent ERIFLEX ERIFLEX Busbar
  • RS Stock No. 277-6178
  • Mfr. Part No. 568662
Each
MYR149.55
Last RS stock
RS PRO 63A Bolted Tag Fuse, 350 V dc, 690V ac, 63.5mm
  • RS Stock No. 221-3665
Each
MYR67.63
In Stock
Legrand 39 Way High Impact Polystyrene Consumer Unit, 90A, IP30 Drivia
  • RS Stock No. 786-5630
  • Mfr. Part No. 4 012 13
Each
MYR742.17
In Stock
Europa EUC1P EUB MCB, 1P, 40A Curve B, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6487
  • Mfr. Part No. EUC1P40B
Each
MYR41.76
In Stock
Better World
Siemens RCBO, 32A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C, Sentron Range
  • RS Stock No. 243-6201
  • Mfr. Part No. 5SU1326-7FP32
Each
MYR726.13
Currently unavailable
ABB S302 MCB, 2P, 20A Curve K, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 200-760
  • Mfr. Part No. 2CDS382001R0487
Each
MYR1,231.32
Temporarily out of stock
ABB Tmax XT Extended Front Terminal for use with Circuit Breaker
  • RS Stock No. 232-0230
  • Mfr. Part No. 1SDA066874R1 EF XT3 4PCS
Each
MYR315.78
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9679
  • Mfr. Part No. 3VA11106ED360AA0
Each
MYR1,867.18
Temporarily out of stock
Siemens SENTRON 5SY8 MCB, 4P, 20A Curve C, 400V AC, 60V DC, 30 kA Breaking Capacity
  • RS Stock No. 610-620
  • Mfr. Part No. 5SY8420-7
Each
MYR1,336.21
Temporarily out of stock
Siemens 20A Cartridge Fuse, 8 x 32mm
  • RS Stock No. 232-2054
  • Mfr. Part No. 3NW6307-1
Each (In a Pack of 10)
MYR26.113
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 250A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 216-4804
  • Mfr. Part No. 3VA1225-6EF42-0AA0
Each
MYR7,251.51
Temporarily out of stock
RS PRO 6.3A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8061
1 Box of 1000
MYR8,224.58
Temporarily out of stock
Schneider Electric Altivar Process Modular Busbar Kit, 480V
  • RS Stock No. 444-146
  • Mfr. Part No. VW3A98ABMAAA
Each
MYR2,292.44
Temporarily out of stock
ABB F200 RCCB, 100A, 2 Pole, 100mA, Type AC, 230V ac
  • RS Stock No. 225-6092
  • Mfr. Part No. 2CSF202001R2900 F202 AC-100/0.1
Each
MYR1,122.87
Temporarily out of stock
Siemens SENTRON 3VA9 Terminal for use with 3VA1 160
  • RS Stock No. 218-1786
  • Mfr. Part No. 3VA9113-0QE00
Each
MYR366.07
In Stock
Eaton PC Board Non Resettable Fuse, Radial 2.5A, 250V ac
  • RS Stock No. 769-3384
  • Mfr. Part No. SS-5F-2-5A-BK
Each (In a Pack of 5)
MYR6.012
Temporarily out of stock
Better World
Siemens, 0AA0 MCCB 4P 400A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 211-6069
  • Mfr. Part No. 3VA2340-6HN42-0AA0
Each
MYR12,763.66
In Stock
Schneider Electric Resi9 R9PF MCB, 3P, 20A, 400V AC, 3000 A Breaking Capacity
  • RS Stock No. 276-8968
  • Mfr. Part No. R9PFC720
Each
MYR506.58
1
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